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PreprintCC BYbioRxiv

The health-relevant architecture of the everyday light exposome

  • J. Zauner1
  • A. Didikoglu
  • S. Aerts
  • G. K. Agbeshie
  • K. O. Akuffo
  • S. G. Akgun
  • S. N. Aydin
  • D. Baeza Moyano
  • D. Boesten
  • J. F. B. Bolte
  • K. Broszio
  • G. Cantarero Garcia
16 more authors
  • R. A. Gonzalez Lezcano
  • C. Guidolin
  • S. Hilden
  • N. Hogervorst
  • A. Jansen
  • Z. Kayar
  • S. Källberg
  • S. Lee
  • S. Melero Tur
  • M. Nilsson Tengelin
  • M. C. Perez Gutierrez
  • A. Sancho-Salas
  • O. Stefani
  • I. Svensson
  • H. von-Breymann
  • M. Spitschan
  1. 1Department Health and Sports Sciences, TUM School of Medicine and Health, Chronobiology & Health, Technical University of Munich, Munich, Germany
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Abstract

Light supports circadian regulation and is associated with non-communicable diseases, yet ocular exposure patterns remain poorly understood. We recruited 191 adults across nine sites in seven countries, combining diaries and contextual reports with near-eye (141 participants; 816 participant-days) and complementary chest-level measurements (154 participants; 902 participant-days). In near-eye analyses, only 24.0% of recorded daytime minutes met the recommendation of at least 250 lx melanopic equivalent daylight illuminance; 63.3% of pre-sleep and 87.7% of bedside sleep-environment minutes met their respective limits. Variation among people and days within sites exceeded that among sites (ratio 1.99; 95%-CI, 1.29-4.77). In hourly models, light source and setting contributed the largest shares of fitted variation after time of day. Site-average outdoor exposure was 9.35 times that while awake at home (95%-CI, 6.95-12.59; 714.2 versus 76.4 lx). This baseline identifies a daytime exposure gap and supports testing interventions in everyday settings to improve light exposure and health.

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Cite

BibTeXRIS
BibTeX
@misc{zauner2026healthrelevant,
  title = {{The health-relevant architecture of the everyday light exposome}},
  author = {J. Zauner and A. Didikoglu and S. Aerts and G. K. Agbeshie and K. O. Akuffo and S. G. Akgun and S. N. Aydin and D. Baeza Moyano and D. Boesten and J. F. B. Bolte and K. Broszio and G. Cantarero Garcia and R. A. Gonzalez Lezcano and C. Guidolin and S. Hilden and N. Hogervorst and A. Jansen and Z. Kayar and S. Källberg and S. Lee and S. Melero Tur and M. Nilsson Tengelin and M. C. Perez Gutierrez and A. Sancho-Salas and O. Stefani and I. Svensson and H. von-Breymann and M. Spitschan},
  howpublished = {bioRxiv},
  year = {2026},
  month = jun,
  doi = {10.64898/2026.06.04.730226},
  url = {https://www.biorxiv.org/content/10.64898/2026.06.04.730226v3},
  note = {CC BY},
}
RIS
TY  - UNPB
TI  - The health-relevant architecture of the everyday light exposome
AU  - J. Zauner
AU  - A. Didikoglu
AU  - S. Aerts
AU  - G. K. Agbeshie
AU  - K. O. Akuffo
AU  - S. G. Akgun
AU  - S. N. Aydin
AU  - D. Baeza Moyano
AU  - D. Boesten
AU  - J. F. B. Bolte
AU  - K. Broszio
AU  - G. Cantarero Garcia
AU  - R. A. Gonzalez Lezcano
AU  - C. Guidolin
AU  - S. Hilden
AU  - N. Hogervorst
AU  - A. Jansen
AU  - Z. Kayar
AU  - S. Källberg
AU  - S. Lee
AU  - S. Melero Tur
AU  - M. Nilsson Tengelin
AU  - M. C. Perez Gutierrez
AU  - A. Sancho-Salas
AU  - O. Stefani
AU  - I. Svensson
AU  - H. von-Breymann
AU  - M. Spitschan
PY  - 2026
DA  - 2026/06/04
PB  - bioRxiv
DO  - 10.64898/2026.06.04.730226
UR  - https://www.biorxiv.org/content/10.64898/2026.06.04.730226v3
AB  - Light supports circadian regulation and is associated with non-communicable diseases, yet ocular exposure patterns remain poorly understood. We recruited 191 adults across nine sites in seven countries, combining diaries and contextual reports with near-eye (141 participants; 816 participant-days) and complementary chest-level measurements (154 participants; 902 participant-days). In near-eye analyses, only 24.0% of recorded daytime minutes met the recommendation of at least 250 lx melanopic equivalent daylight illuminance; 63.3% of pre-sleep and 87.7% of bedside sleep-environment minutes met their respective limits. Variation among people and days within sites exceeded that among sites (ratio 1.99; 95%-CI, 1.29-4.77). In hourly models, light source and setting contributed the largest shares of fitted variation after time of day. Site-average outdoor exposure was 9.35 times that while awake at home (95%-CI, 6.95-12.59; 714.2 versus 76.4 lx). This baseline identifies a daytime exposure gap and supports testing interventions in everyday settings to improve light exposure and health.
ER  -